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https://www.readbyqxmd.com/read/28548701/microtubules-regulate-brush-border-formation
#1
Facundo M Tonucci, Anabela Ferretti, Evangelina Almada, Pamela Cribb, Rodrigo Vena, Florencia Hidalgo, Cristián Favre, Matt J Tyska, Irina Kaverina, M Cecilia Larocca
Most epithelial cells contain apical membrane structures associated to bundles of actin filaments, which constitute the brush border. Whereas microtubule participation in the maintenance of the brush border identity has been characterized, their contribution to de novo microvilli organization remained elusive. Hereby, using a cell model of individual enterocyte polarization, we found that nocodazole induced microtubule depolymerization prevented the de novo brush border formation. Microtubule participation in brush border actin organization was confirmed in polarized kidney tubule MDCK cells...
May 26, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28545088/transcriptional-activation-of-hif-1-by-a-ros-erk-axis-underlies-the-resistance-to-photodynamic-therapy
#2
María Julia Lamberti, María Florencia Pansa, Renzo Emanuel Vera, Martín Ernesto Fernández-Zapico, Natalia Belén Rumie Vittar, Viviana Alicia Rivarola
Photodynamic therapy (PDT), a promising treatment option for cancer, involves the activation of a photosensitizer (PS) by local irradiation with visible light. Excitation of the PS leads to a series of photochemical reactions and consequently the local generation of harmful reactive oxygen species (ROS) causing limited or none systemic defects. However, the development of resistance to this promising therapy has slowed down its translation into the clinical practice. Thus, there is an increase need in understanding of the molecular mechanism underlying resistance to PDT...
2017: PloS One
https://www.readbyqxmd.com/read/28542730/estrogen-receptor-%C3%AE-regulates-the-tumoral-suppressor-pten-to-modulate-pituitary-cell-growth
#3
Pablo Anibal Perez, Juan Pablo Petiti, Florencia Picech, Carolina Beatriz Guido, Liliana Del Valle Sosa, Ezequiel Grondona, Jorge Humberto Mukdsi, Ana Lucia De Paul, Alicia Ines Torres, Silvina Gutierrez
In this study, we focused on ERβ regulation in the adenohypophysis under different estrogenic milieu, by analyzing whether ER modulates the phosphatase and tensin homologue deleted on chromosome 10 (PTEN) expression and its subcellular localization on anterior pituitary glands from Wistar rats and GH3 lactosomatotroph cells that over-expressed ERβ. ERβ was regulated in a cyclic manner, and underwent dynamic changes throughout the estrous cycle, with decreased ERβ+ cells in estrus and under E2 treatment, but increased in ovariectomized rats...
May 20, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28522734/voluntary-control-of-epileptiform-spike-wave-discharges-in-awake-rats
#4
Jeremy A Taylor, Krista M Rodgers, Florencia M Bercum, Carmen J Booth, F Edward Dudek, Daniel S Barth
Genetically inherited absence epilepsy in humans is typically characterized by brief (seconds) spontaneous seizures, which involve spike-wave discharges (SWDs) in the EEG and interruption of consciousness and ongoing behavior. Genetic (inbred) models of this disorder in rats have been used to examine mechanisms, comorbidities and anti-absence drugs. SWDs have also been proposed as models of complex partial seizures (CPSs) following traumatic brain injury (post-traumatic epilepsy; PTE). However, the ictal characteristics of these rat models, including SWDs and associated immobility, are also prevalent in healthy outbred laboratory rats...
May 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28515361/lupus-and-proliferative-nephritis-are-pad4-independent-in-murine-models
#5
Rachael A Gordon, Jan M Herter, Florencia Rosetti, Allison M Campbell, Hiroshi Nishi, Michael Kashgarian, Sheldon I Bastacky, Anthony Marinov, Kevin M Nickerson, Tanya N Mayadas, Mark J Shlomchik
Though recent reports suggest that neutrophil extracellular traps (NETs) are a source of antigenic nucleic acids in systemic lupus erythematosus (SLE), we recently showed that inhibition of NETs by targeting the NADPH oxidase complex via cytochrome b-245, β polypeptide (cybb) deletion exacerbated disease in the MRL.Faslpr lupus mouse model. While these data challenge the paradigm that NETs promote lupus, it is conceivable that global regulatory properties of cybb and cybb-independent NETs confound these findings...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28502044/hippocampal-proteomic-analysis-reveals-distinct-pathway-deregulation-profiles-at-early-and-late-stages-in-a-rat-model-of-alzheimer-s-like-amyloid-pathology
#6
Sonia Do Carmo, Gogce Crynen, Tiffany Paradis, Jon Reed, M Florencia Iulita, Adriana Ducatenzeiler, Fiona Crawford, A Claudio Cuello
The cerebral accumulation and cytotoxicity of amyloid beta (Aβ) is central to Alzheimer's pathogenesis. However, little is known about how the amyloid pathology affects the global expression of brain proteins at different disease stages. In order to identify genotype and time-dependent significant changes in protein expression, we employed quantitative proteomics analysis of hippocampal tissue from the McGill-R-Thy1-APP rat model of Alzheimer-like amyloid pathology. McGill transgenic rats were compared to wild-type rats at early and late pathology stages, i...
May 13, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28500868/type-1-diabetes-mellitus-care-and-education-in-china-the-3c-study-of-coverage-cost-and-care-in-beijing-and-shantou
#7
Helen C McGuire, Linong Ji, Katarzyna Kissimova-Skarbek, David Whiting, Florencia Aguirre, Puhong Zhang, Shaoda Lin, Chunxiu Gong, Weigang Zhao, Juming Lu, Xiaohui Guo, Ying Ji, Till Seuring, Tianpei Hong, Lishu Chen, Jianping Weng, Zhiguang Zhou
AIMS: The paucity of data on Type 1 diabetes in China hinders progress in care and policy-making. This study compares Type 1 diabetes care and clinical outcomes in Beijing and Shantou with current clinical guidelines. METHODS: The 3C Study was a cross-sectional study of the clinical practices and outcomes of people with Type 1 diabetes. The study sequentially enrolled 849 participants from hospital records, inpatient wards, and outpatient clinics. Data were collected via face-to-face interviews with patients and health professionals, the Summary of Diabetes Self-Care Activities, medical records, and venous blood samples...
February 28, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28495034/-presence-of-acanthamoeba-spp-in-watering-trough-in-la-pampa-province-argentina
#8
María Del C Rojas, Marcelo Rodríguez Fermepín, Florencia Gracia Martínez, Sixto R Costamagna
Free-living Amoebae of Acanthamoeba genus include non-pathogenic and pathogenic strains that are currently classified in 18 different genotypes, T1-T18. In this study, a survey was carried out to evaluate the presence of Acanthamoeba strains inwatering trough sample in La Pampa province, Argentina. Sample were inoculated onto non-nutrient agar plates and were checked for the presence of Acanthamoeba. Polymerase chain reaction was performed with genus-specific primers JDP1/JDP2, followed by direct sequencing of the polymerase chain reaction product for molecular identification...
May 8, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28494025/sequencing-of-small-rnas-of-the-fern-pleopeltis-minima-polypodiaceae-offers-insight-into-the-evolution-of-the-microrna-repertoire-in-land-plants
#9
Florencia Berruezo, Flávio S J de Souza, Pablo I Picca, Sergio I Nemirovsky, Leandro Martínez Tosar, Mercedes Rivero, Alejandro N Mentaberry, Alicia M Zelada
MicroRNAs (miRNAs) are short, single stranded RNA molecules that regulate the stability and translation of messenger RNAs in diverse eukaryotic groups. Several miRNA genes are of ancient origin and have been maintained in the genomes of animal and plant taxa for hundreds of millions of years, playing key roles in development and physiology. In the last decade, genome and small RNA (sRNA) sequencing of several plant species have helped unveil the evolutionary history of land plants. Among these, the fern group (monilophytes) occupies a key phylogenetic position, as it represents the closest extant cousin taxon of seed plants, i...
2017: PloS One
https://www.readbyqxmd.com/read/28484798/asymmetric-patterns-of-small-molecule-transport-after-nanosecond-and-microsecond-electropermeabilization
#10
Esin B Sözer, C Florencia Pocetti, P Thomas Vernier
Imaging of fluorescent small molecule transport into electropermeabilized cells reveals polarized patterns of entry, which must reflect in some way the mechanisms of the migration of these molecules across the compromised membrane barrier. In some reports, transport occurs primarily across the areas of the membrane nearest the positive electrode (anode), but in others cathode-facing entry dominates. Here we compare YO-PRO-1, propidium, and calcein uptake into U-937 cells after nanosecond (6 ns) and microsecond (220 µs) electric pulse exposures...
May 8, 2017: Journal of Membrane Biology
https://www.readbyqxmd.com/read/28483957/candida-parapsilosis-sensu-lato-in-pediatric-patients-identification-of-cryptic-species-and-antifungal-susceptibility-testing
#11
Maria Emilia Cattana, Catiana Dudiuk, Mariana Fernández, Florencia Rojas, Liliana Alegre, Susana Córdoba, Guillermo García-Effron, Gustavo Giusiano
A total of 59 C. parapsilosis sensu stricto and 1 C. orthopsilosis recovered from catheters and blood cultures of pediatric patients of the Northeastern region of Argentina were studied. Susceptibility to azoles, amphotericin B, and echinocandins were tested by broth microdilution method. According to CLSI clinical breakpoints, more than 91% of the strains were azole-susceptible while 15% showed high amphotericin B MICs.
May 8, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28479374/cafeteria-diet-differentially-alters-the-expression-of-feeding-related-genes-through-dna-methylation-mechanisms-in-individual-hypothalamic-nuclei
#12
Gisela Paola Lazzarino, María Florencia Andreoli, María Florencia Rossetti, Cora Stoker, María Virgina Tschopp, Enrique Hugo Luque, Jorge Guillermo Ramos
We evaluated the effect of cafeteria diet (CAF) on the mRNA levels and DNA methylation state of feeding-related neuropeptides, and neurosteroidogenic enzymes in discrete hypothalamic nuclei. Besides, the expression of steroid hormone receptors was analyzed. Female rats fed with CAF from weaning increased their energy intake, body weight, and fat depots, but did not develop metabolic syndrome. The increase in energy intake was related to an orexigenic signal of paraventricular (PVN) and ventromedial (VMN) nuclei, given principally by upregulation of AgRP and NPY...
May 4, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28472973/arterial-stiffness-by-oscillometric-device-and-telomere-lenght-in-juvenile-idiopathic-artrhitis-with-no-cardiovascular-risk-factors-a-cross-sectional-study
#13
Maria Mercedes Picarelli, Luiz Cláudio Danzmann, Lucas Kich Grun, Nevton Teixeira Rosa Júnior, Patrícia Lavandovsky, Fátima Theresinha Costa Rodrigues Guma, Renato T Stein, Florência Barbé-Tuana, Marcus Herbert Jones
BACKGROUND: Advances in juvenile idiopathic arthritis (JIA) treatment is promoting free disease survival. Cardiovascular disease (CVD) may emerge as an important cause of morbidity and mortality. Pulse wave velocity (PWV), a surrogate marker of arterial stiffness, and telomere length (TL) are considered as potential predictors of CVD and its outcomes. The study aim was to assess PWV, TL in a JIA population and to test its correlation. In a cross sectional study, 24 JIA patients, 21 controls for TL and 20 controls for PWV were included...
May 4, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28469066/synthesis-crystal-structure-and-study-of-the-crystal-packing-in-the-complex-bis-4-aminopyridine-%C3%AE%C2%BAn-1-dichloridocobalt-ii
#14
Olga Carolina Sanchez Montilva, Federico Movilla, Maricel Gabriela Rodriguez, Florencia Di Salvo
Despite the large number of reported crystalline structures of coordination complexes bearing pyridines as ligands, the relevance of π-π interactions among these hereroaromatic systems in the stabilization of their supramolecular structures and properties is not very well documented in the recent literature. The title compound, [CoCl2(C5H6N2)2], was obtained as bright-blue crystals suitable for single-crystal X-ray diffraction analysis from the reaction of 4-aminopyridine with cobalt(II) chloride in ethanol...
May 1, 2017: Acta Crystallographica. Section C, Structural Chemistry
https://www.readbyqxmd.com/read/28467984/neutrophil-extracellular-traps-stimulate-proinflammatory-responses-in-human-airway-epithelial-cells
#15
Florencia Sabbione, Irene A Keitelman, Leonardo Iula, Mariana Ferrero, Mirta N Giordano, Pablo Baldi, Martín Rumbo, Carolina Jancic, Analía S Trevani
Tissue injury leads to the release of uric acid (UA). At high local concentrations, UA can form monosodium urate crystals (MSU). MSU and UA stimulate neutrophils to release extracellular traps (NET). Here, we investigated whether these NET could be involved in the development of inflammation by stimulating cytokine release by airway epithelial cells. We found that NET significantly increased the secretion of CXCL8/IL-8 and IL-6 by alveolar and bronchial epithelial cells. These effects were not observed when NETosis was inhibited by Diphenyleneiodonium, elastase inhibitor, or Cl-amidine...
May 4, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28465189/p53-tumor-suppressor-is-required-for-efficient-execution-of-the-death-program-following-treatment-with-a-cytotoxic-limonoid-obtained-from-melia-azedarach
#16
Mariana Belén Joray, Florencia Villafañez, María Laura González, María Inés Crespo, Jerónimo Laiolo, Sara María Palacios, José Luis Bocco, Gastón Soria, María Cecilia Carpinella
This work examines the antitumor activity of an isomeric mixture (1), composed of the limonoids meliartenin and its interchangeable isomer 12-hydroxyamoorastatin. The results obtained showed that 1 displayed outstanding cytotoxic activity against CCRF-CEM, K562, A549 and HCT116 cells, with a highly selective effect on the latter, with an IC50 value of 0.2 μM. Based on this finding, HCT116 cells were selected to study the mechanism of action of 1. Cell cycle analysis revealed that 1 induced sustained arrest in the S-phase, which was followed by the triggering of apoptotic cell death and reduced clonogenic capacity...
April 29, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28463217/-neuropsychological-performance-in-patients-with-myasthenia-gravis
#17
María Bárbara Eizaguirre, Florencia Aguirre, Cecilia Yastremiz, Sandra Vanotti, Andrés Villa
Myasthenia gravis is a chronic autoimmune disease that affects the neuromuscular transmission. Controversial findings had been reported about cognitive impairment in this disease. The aim of this study was to investigate the cognitive pattern of patients with myasthenia gravis. There were enrolled 24 patients with myasthenia gravis, anti-acetylcholine receptor antibodies (ACRA) positive, and 24 healthy controls. PATIENTS: age 43.9 ± 14.8, years of education 10.9 ± 3.3. CONTROLS: age 44...
2017: Medicina
https://www.readbyqxmd.com/read/28463212/-neurologic-complications-of-infective-endocarditis-do-they-have-an-impact-on-prognosis
#18
Santiago Pigretti, María Cristina Zurrú, Aníbal Arias, Florencia Parcerisa, Ariel Luzzi, César Belziti
Neurologic complications of infective endocarditis have been observed in 20-40% of cases. Our aim was to determine the frequency of neurologic involvement, clinical manifestations, lesional patterns and evolution in patients with infective endocarditis. This was a prospective cohort study. We included 98 patients with left-sided infective endocarditis. Forty seven percent presented neurologic involvement at some time of the disease. The frequency of symptoms was: focal deficit 61%, sensory disturbance 17% and seizures 2%, while 20% remain asymptomatic...
2017: Medicina
https://www.readbyqxmd.com/read/28461178/four-surgical-approaches-to-cervical-excision-during-laparoscopic-radical-trachelectomy-for-early-cervical-cancer
#19
José Saadi, Lucas Minig, Florencia Noll, Gabriel Saraniti, José Miguel Cárdenas-Rebollo, Myriam Perrotta
A retrospective analysis was performed at the Gynecology Department of the Hospital Italiano de Buenos Aires in Buenos Aires, Argentina to compare clinical and oncologic outcomes of four different surgical approaches of cervical excision (CE) during radical trachelectomy (RT) for early cervical cancer. The study included 22 consecutive women who had undergone laparoscopic RT for early cervical cancer between May 2011 and July 2016 in our tertiary care hospital. Patients were divided into four groups according to their respective tumor pathologies and surgical approaches...
April 28, 2017: Journal of Minimally Invasive Gynecology
https://www.readbyqxmd.com/read/28454078/new-complexes-of-cu-ii-with-dipicolinate-and-pyridyl-based-ligands-an-experimental-and-dft-approach
#20
Florencia Luzardo, Natalia Álvarez, Carlos Kremer, Andrea S S de Camargo, Jorge S Gancheff
The three novel mononuclear copper(II) complexes with dipicolinate and pyridyl-based ligands [Cu(dipic)(L)(OH2)] (L=4-picoline, vinylpyridine, 4-styrylpyridine; dipic(2-)=dipicolinate) were afforded and structurally characterized. X-ray diffraction studies accounted for slight distorted square-pyramidal structures in which the dianion dipic(2-) acts as a tridentate ligand in a mer-fashion, the N-donor species occupy an in-plane position, and a water molecule was detected apically coordinated. To assess the effect of the nature of the pyridyl-substituent (para position) on electronic properties, other complexes were also synthesized: [Cu(dipic)(py)(OH2)], [{Cu(dipic)(OH2)}2(μ-pyz)] and [{Cu(dipic)(OH2)}(μ-pypy){Cu(dipic)}] (py=pyridine, pyz=pyrazine, pypy=(E)-1,2-bis(pyridine-4-yl)ethane)...
April 8, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
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